Dear Freesurfer experts, Sorry to bother you again, but I have two more questions about extracting (thickness/surface/GI) values from a certain cluster. As I understood, the abs.y.ocn.dat file gives the average values for a given significant cluster (e.g. a cluster where there is a significant AxB interaction). I may be completely misunderstanding things, but if I use these values in SPSS for further statistics and test the same interaction (AxB), than according to SPSS this interaction is not significant (corrected for the same covariates as in the FSGD file). Could you tell me what is going wrong here? I do not trust my results now. Furthermore, is it possible (and if so, how?) to extract the average values of exactly the same cluster, but in an independent group not used in the analysis, for post-hoc comparisons in SPSS? Thanks, Maaike
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